String Null or Empty or int? and double?

 ? will not apply on string. It will be only apply on int?

int? a = 5;

Refresh in windows 10 with vb script

 Create refresh.vbs file

Paste the below code:-

Set ws = CreateObject("wscript.shell")

    ws.sendkeys "{F5}"

How to create tree batch file fregmentation in windows 10

 Create tree.bat file.

paste the below text:-

"Echo off

cd/

tree

C:

tree

D:

tree"

File download docx OR XML file in ASP.NET C#

 protected void lnkDownloadAnnexB_Click(object sender, EventArgs e)

    {

        try

        {

            Response.ContentType = "application/docx";

            string filePath = "~/Document/Download/ANNEXURE-B.docx";

            Response.AddHeader("Content-Disposition", "attachment;filename=\"" + filePath + "\"");

            Response.TransmitFile(Server.MapPath(filePath));

            Response.End();

        }

How to create dashboard in ASP.NET C#

 aspx file page

<%@ Page Title="" Language="C#" MasterPageFile="~/View/Admin/Admin.master" AutoEventWireup="true" CodeFile="Dashboard.aspx.cs" Inherits="View_Admin_Default" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>

<script type="text/javascript">

    $(function () {

        $('#container').highcharts({

            chart: {

                plotBackgroundColor:null,

                plotBorderWidth: 1,

                plotShadow: false

            },